基于MVLEM考虑钢筋滑移的RC剪力墙有限元分析

Finite Element Analysis for Reinforced Concrete Shear Wall Considering Bond-Slip Based on MVLEM

钢筋混凝土剪力墙结构作为最重要的结构形式之一,其抗震性能分析一直是研究的热点和难点。本文在多垂直杆单元模型的基础上,提出了一种可考虑钢筋滑移影响的改进的多垂直杆单元模型,并且基于分离式建模的思想实现了其在OpenSees平台上的建模。分别利用多垂直杆单元模型和改进的多垂直杆单元模型对整浇式RC剪力墙模型试验和装配整体式RC剪力墙模型试验进行了数值模拟分析,通过与试验结果对比分析,发现改进的多垂直杆单元模型不同程度地提高了数值模拟的精度,该单元模型可用于RC剪力墙结构的弹塑性数值模拟分析。

Reinforced concrete shear wall structure is one of the most important structural forms. Seismic performance analysis of shear wall structure is the focus and difficulty point. Multi-vertical line element model (MVLEM) considering bond-slip is developed on the basis of MVLEM. According to the method of discrete model, a refined MVLEM is built on OpenSees platform. Numerical simulation of cast-in-situ reinforced conceded (RC) shear wall tests and assembled monolithic RC shear wall tests are performed using MVLEM and refined MVLEM. The simulation results agree well with the test results in literature. The analytical results show that the refined MVLEM improves precision of simulation results. The macrocosmic model is suitable for elastic-plastic analysis of RC shear wall structures.